IS1500UN-98
HAYWARD HIGH PERFORMANCE PUMP
INSTALLATION AND OPERATING INSTRUCTIONS
HAYWARD POOL PRODUCTS, INC.
900 FAIRMOUNT AVENUE, ELIZABETH, NEW JERSEY 07207
Your Hayward centrifugal pump has been quality-built
and engineered to give you efficient, dependable service.
Additionally, it may be equipped with optional union
connectors to make installation and future service easier.
The advanced design permits use of either single or dual
speed motors and reduces operation and maintenance
to simple, common-sense procedures.
GENERAL TIPS ON PUMP INSTALLATION
The Power-Flo UN pump must be installed below
water level. For best pump performance, locate the
system below the pool water line as close to the tub
as possible. Make sure suction joints are tight.
Suction pipe should be as large or larger than
discharge pipe.
Damp, non-ventilated locations should be avoided.
Motors require free circulation of air to aid in cooling.
Insure that the electrical supply available agrees
with the motor’s voltage, phase and cycle, and that
wire size is adequate for the HP (KW) rating and
distance from power source. Motor must always be
properly grounded. If cord is connected, use a
properly grounded outlet. Electrical circuits must be
protected by proper size ground fault circuit
interrupter (GFCI) as required by applicable
electrical codes. All electrical wiring must be
performed by qualified personnel, and must
conform to local codes and regulations.
MAINTENANCE
Hayward pumps have self-lubricating motor
bearing and shaft seals. No lubrication is
necessary.
Keep motor clean. Insure air vents are free from
obstruction.
Occasionally, shaft seals must be replaced, due
to wear or damage. See instructions.
STARTING INSTRUCTIONS
Be sure water can move freely to and from the
pump inlet and outlet. Never operate the pump
without water. Water acts as a coolant and lubricant
for the mechanical shaft seal.
Turn on pump. If pump will not start, see TROUBLE
SHOOTING GUIDE on back page. Refer to tub
manufacturer’s instructions.
NOTE: ANSI/NSPI-4 Article V, standard for
above-ground and on-ground pools, advises
that components such as the filtration system,
pumps and heater be positioned so as to
prevent their being used as a means of access
to the pool by young children.
CAUTION: All suction and discharge lines must
be open when starting the system. Failure to do
so could cause severe personal injury and/or
property damage.
STORAGE/WINTERIZING
Pump and motor must be protected from freezing. If
freezing temperatures are expected, be sure all
water has been drained from tub, piping and pump.
Shut off all electric power at circuit breaker or main
service panel.
1.
2.
3.
FOR REFERENCE ONLY
a
b
UN Series pumps have externally threaded inlet and
outlet to accommodate optional union connectors.
REF.
NO.
1
2
3
4
5
6
7
8a
8b
9
10
11
12
13
NO.
REQ’D.
7
1
1
1
1
1
7
1
1
4
2
2
2
1
MODEL
SP1500UN
SPX1500N2
SPX1501BT
SPX1082Z5B
SPX1500E
SPX1500KA
SPX1501AAT
SPX1500Y2
SPX1500Z1E
----------
SPX1495Z1
SPX1500G
SPX1500JS
SPX1700FG
MODEL
SP1510UN
SPX1500N2
SPX1501BT
SPX1082Z5B
SPX1500F
SPX1500KA
SPX1501AAT
SPX1500Y2
SPX1510Z1E
SPX1510Z2E
SPX1495Z1
SPX1500G
SPX1500JS
SPX1700FG
MODEL
SP1511UN
SPX1500N2
SPX1501BT
SPX1082Z5B
SPX1500L
SPX1500KA
SPX1501AAT
SPX1500Y2
SPX1510Z1XE
SPX1510Z2XE
SPX1495Z1
SPX1500G
SPX1500JS
SPX1700FG
Bolt, No. 10-24 Hex. Head
Housing Cover
Housing O-Ring
Impeller
Seal Assembly
Pump Housing
Nut, No. 10-24 Hex.
Motor - 60 cycle, single phase
Motor - 60 cycle, single phase - 2 speed
Motor-To-Housing Bolt
O-Ring (Optional)
Union Nut (Optional)
Union End Connector, SKT (Optional)
Drain Plug w/Gasket
DESCRIPTION PART NUMBER
To order, specify motor manufacturer, HP and pump model no.
SEAL CHANGE INSTRUCTIONS
SP1500UN SERIES
GENERAL
Exercise extreme care in handling and installing the new seal and ceramic seat assembly.
The lapped and polished surfaces may easily be damaged by dirt or scratching.
For safety, all service must be performed with all power shut off.
1.
2.
3.
4.
5.
6.
Remove pump and motor assembly from piping
system by unscrewing union nuts.
Remove pump housing cover by removing the
seven (7) housing bolts and nuts which fasten
housing cover to pump housing. The impeller is
now exposed.
To remove impeller, insert screwdriver in slot at
end of motor.* Hold screwdriver so as to keep
shaft from turning, and rotate the impeller in a
counterclockwise direction. The spring portion of
the seal assembly is now exposed.
Note carefully the position of the spring seal and
pull it off the impeller.
To remove the stationary (ceramic seat) part of the
seal assembly:
a. Loosen the four (4) motor securing bolts and
disengage the motor from the pump housing.
b. With motor removed, press the clear plastic
and ceramic seat assembly out of the pump
housing recess. If tight, tap lightly from the
“motor” side.
Clean and lubricate the impeller hub shaft and
pump housing seal recess with a dilute solution of
non-granulated liquid-type soap. Gently wipe the
polished face of the new ceramic seat with a soft,
dry cotton cloth.
7.
8.
9.
10.
11.
12.
Press the new spring portion of the assembly onto
the impeller, black polished surface facing away
from the impeller.
Carefully press ceramic seat, with O-ring, into clear
plastic seat retainer—polished surface facing out.
Be sure O-ring is in place on cut ridge of clear
plastic retainer. Press plastic retainer, with ceramic
seat inside, into recess of pump housing—O-ring
end first. Replace the assembly firmly and evenly.
Carefully insert the motor shaft through the seat
assembly, and secure motor to pump housing with
four (4) motor securing bolts. (Be sure motor base
is positioned properly.)
Screw the impeller, with spring seal, onto the motor
shaft, hand tight, by turning clockwise.
Clean fiber gasket (replace if necessary) and fasten
housing cover to pump housing with seven (7) bolts
and nuts. Tighten bolts and nuts alternately and
evenly.
Reconnect pump to piping system. Be sure to fill
strainer with water before restarting.
*For A.O. Smith Motors: Remove motor end cover and
carefully
apply wrench to flat on motor shaft to hold shaft from turning.
ELECTRICAL GUIDE —60 CYCLE MOTORS—SINGLE PHASE
MOTOR
1/2
3/4
1
VOLTS
115
115
115
CIRCUIT BREAKER
RATINGS—AMPS
10
15
20
BRANCH FUSETRON
RATINGS—AMPS
10
15
20
RECOMMENDED
WIRE SIZE
0-50’
No. 14
No. 14
No. 12
A separate electrical circuit, utilizing a rating as above, is recommended.
KW HP
.37
.55
.75
A. MOTOR WON’T START
1.Check for improper or loose connections, open
switches or relays, blown circuit breakers or fuses.
2.Manually check rotation of motor shaft for free
movement and lack of obstruction.
B. MOTOR CUTS OUT—Check for:
1.Wiring, loose connections, etc.
2.Low voltage at motor (frequently caused by
undersized wiring).
3.Binding and overload. (Amperage reading)
NOTE: Your Hayward pump motor is equipped with
Automatic Thermal Overload Protection. The
motor will automatically shut off, under normal
conditions, before heat damage build-up, due
to an improper operating condition, can occur.
The motor will auto-restart when safer heat
level is reached.
C. MOTOR HUMS, BUT DOES NOT START—
Check for:
1.Centrifugal switch stuck in open position.
2.Binding of motor shaft.
D. PUMP WON’T PRIME
1.Make sure pump/strainer housing is filled with
water.
2.Make sure all suction and discharge lines and
valves are open and unobstructed, and that pool
water level is above all suction openings.
3.Block off suction as close to pump as possible and
determine if pump will develop a vacuum.
a. If pump develops a vacuum, check for blocked
suction line or strainer, or air leak in suction
piping.
b. If pump does not develop a vacuum and pump
has sufficient “priming water”:
(1) Tighten all bolts and fittings.
(2) Check voltage to make sure pump is up to
speed.
(3) Open pump and check for clogging or
obstruction.
(4) Remove and replace shaft seal.
E. LOW FLOW—Generally check for:
1.Clogged or restricted suction line; undersized
pool piping.
2.Plugged or restricted discharge line.
3.Air leak in suction (bubbles issuing from return
fittings).
4.Pump operating underspeed (low voltage).
5.Plugged or restricted impeller.
6. If dual speed pump, check Hi/Lo switch
sequencing.
F. NOISY PUMP—Check for:
1.Air leak in suction causing rumbling in pump.
2.Cavitation due to restricted or undersized suction
line and unrestricted discharge lines. Correct
suction condition or throttle discharge lines, if
practical.
3.Vibration due to improper mounting, etc.
4.Foreign matter in pump housing.
5.Motor bearings made unserviceable by wear, rust,
or continual overheating.
TROUBLE SHOOTING GUIDE
SERVICE & REPAIRS
Consult your local Hayward dealer or service center.
No pumps or motors may be returned directly to the factory without the expressed
written authorization of Hayward Pool Products, Inc.
©1998 Hayward Printed in U.S.A.Rev. 12/98
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